Iraqi Federal police take two handcuffed suspected Islamic State militants for interrogation after they were arrested inside their home on the western side of Mosul, Iraq, Monday, February 27, 2017. (Photo by Khalid Mohammed/AP Photo)

An Iraqi Airforce helicopter fires missiles at Islamic State fighters at the outskirts of Mosul, Iraq, February 26, 2017. (Photo by Goran Tomasevic/Reuters)

Iraqi special forces members rests during a battle with Islamic State fighters on the outskirts of Mosul, Iraq, February 25, 2017. (Photo by Goran Tomasevic/Reuters)

Iraqi soldiers help displaced Iraqis flee their homes as Iraqi forces battle with Islamic State militants, in western Mosul, Iraq February 26, 2017. (Photo by Alaa Al-Marjani/Reuters)

Iraqi soldiers help displaced Iraqis flee their homes as Iraqi forces battle with Islamic State militants, in western Mosul, Iraq February 26, 2017. (Photo by Alaa Al-Marjani/Reuters)

Displaced Iraqis wait for a security check at an Iraqi security forces base in western Mosul, Iraq February 26, 2017. (Photo by Alaa Al-Marjani/Reuters)

Displaced Iraqis flee their homes as Iraqi forces battle with Islamic State militants, in western Mosul, Iraq February 26, 2017. (Photo by Alaa Al-Marjani/Reuters)

Iraqi security forces help a displaced Iraqi woman flee her home as Iraqi forces battle with Islamic State militants in western Mosul, Iraq February 26, 2017. (Photo by Alaa Al-Marjani/Reuters)

Iraqi security forces members help civilians as they flee the violence in western Mosul, Iraq February 26, 2017. (Photo by Alaa Al-Marjani/Reuters)

A displaced Iraqi woman, flees her home as Iraqi forces battle with Islamic State militants, in western Mosul, Iraq February 26, 2017. (Photo by Alaa Al-Marjani/Reuters)

A member of Iraqi security forces takes his position during a battle with Islamic State fighters, in western Mosul, Iraq February 26, 2017. (Photo by Alaa Al-Marjani/Reuters)

A displaced Iraqi man sits next to the body of a relative who was killed during a battle between Islamic State fighters and Iraqi troops in western Mosul, Iraq February 26, 2017. (Photo by Mahdi Talaat/Reuters)

Iraqi Counter-Terrorism Service (CTS) members help a wounded civilian who fled the violence in western Mosul, Iraq February 26, 2017. (Photo by Mahdi Talaat/Reuters)

A displaced Iraqi man who just fled his home, talks to Iraqi special forces officers at their base, as Iraqi forces battle with Islamic State militants in western Mosul, Iraq February 27, 2017. (Photo by Zohra Bensemra/Reuters)

A displaced elderly Iraqi man who just fled his home arrives on military humvee at Sepcial forces base , as Iraqi forces battle with Islamic State militants, in western Mosul, Iraq February 27, 2017. (Photo by Zohra Bensemra/Reuters)

A tank from the Iraqi security forces is pictured during a battle with Islamic State militants in al-Josaq district in western Mosul, Iraq February 27, 2017. (Photo by Azad Lashkaril/Reuters)

Iraqi security forces member is pictured during a battle with Islamic State's militants in al-Josaq district in western Mosul, Iraq February 27, 2017. (Photo by Azad Lashkaril/Reuters)

Iraqi security forces members are pictured during a battle with Islamic State's militants in al-Josaq district in western Mosul, Iraq February 27, 2017. (Photo by Azad Lashkaril/Reuters)

Iraqi security forces inspect a home during a battle with Islamic State's militants in al-Josaq district in western Mosul, Iraq February 27, 2017. (Photo by Azad Lashkaril/Reuters)

An Iraqi Special Forces soldier moves through a hole as he searches for Islamic State fighters in Mosul, Iraq February 27, 2017. (Photo by Goran Tomasevic/Reuters)

An Iraqi Special Forces soldier talks to a woman as he searches with others soldiers for Islamic State fighters in Mosul, Iraq February 27, 2017. (Photo by Goran Tomasevic/Reuters)

A man speaks to Iraqi Special Forces soldiers as they search his house for Islamic State fighters in Mosul, Iraq February 27, 2017. (Photo by Goran Tomasevic/Reuters)

Displaced Iraqis who fled their homes walk through the desert, as Iraqi forces battle with Islamic State militants in western Mosul, Iraq, February 28, 2017. (Photo by Zohra Bensemra/Reuters)

Displaced Iraqis who just fled their homes are transported to refugee camps as Iraqi forces battle with Islamic State militants, in western Mosul, Iraq February 28, 2017. (Photo by Zohra Bensemra/Reuters)

A special forces member gives bottles of water to displaced children, who just fled their homes, at their base as Iraqi forces battle with Islamic State militants, in western Mosul, Iraq February 28, 2017. (Photo by Zohra Bensemra/Reuters)

An Iraqi special forces soldier carries a woman injured during a battle between Iraqi forces and Islamic State fighters in Mosul, Iraq February 28, 2017. (Photo by Goran Tomasevic/Reuters)

Members of the rapid response forces help displaced people, who fled their home, as they look for safe area in Mosul, Iraq February 28, 2017. (Photo by Alaa Al-Marjani/Reuters)

Displaced Iraqi people, who fled their home, look for safe area in Mosul, Iraq February 28, 2017. (Photo by Alaa Al-Marjani/Reuters)

Smoke rises after a mortar shell hit during the battle with Islamic State militants in Mosul, Iraq February 28, 2017. (Photo by Alaa Al-Marjani/Reuters)

Iraqi Special Operations Forces arrest a person suspected of belonging to Islamic State militants in western Mosul, Iraq February 26, 2017. Picture taken February 26, 2017. (Photo by Alaa Al-Marjani/Reuters)

Iraqi Special Operations Forces arrest a person suspected of belonging to Islamic State militants in western Mosul, Iraq, February 26, 2017. (Photo by Alaa Al-Marjani/Reuters)

Iraqi troops fire a missile towards Islamic State (IS) group fighters from the outskirts of Mosul as Iraqi forces battle against the group to recapture the west of the city on February 28, 2017. Hundreds of civilians fled through the desert to escape fighting and privation in Mosul, joining thousands of others who left their homes as conditions worsen in the city's west. (Photo by Aris Messinis/AFP Photo)

Iraqi forces advance during fighting against Islamic State militants, in western Mosul, Iraq, Monday, February 27. 2017. A senior Iraqi police commander said Monday that troops have taken control of the western side of a key bridge in Mosul amid intense clashes with the Islamic State group. The commander of the Federal Police Rapid Response Force, said his forces pushed into Mosul's western Gawsaq neighborhood Monday, reaching the foot of what's known locally as the 4th Bridge. (Photo by Khalid Mohammed/AP Photo)

Iraqis run for cover as they flee Mosul's Al-Tayaran neighbourhood on February 28, 2017, during an offensive by Iraqi forces to retake the area from Islamic State (IS) group fighters. Hundreds of civilians fled through the desert to escape fighting and privation in Mosul, joining thousands of others who left their homes as conditions worsen in the city's west. (Photo by Ahmad Al-Rubaye/AFP Photo)

A Federal policeman, injured during fighting between Iraqi security forces and Islamic State militants, receives first aid in a field clinic on the western side of Mosul, Iraq, Monday, February 27, 2017. (Photo by Khalid Mohammed/AP Photo)

A Federal policeman, injured during fighting between Iraqi security forces and Islamic State militants is taken to a hospital after receiving first aid in a field clinic on the western side of Mosul, Iraq, Monday, February 27, 2017. (Photo by Khalid Mohammed/AP Photo)